pour footings and then call in a couple block layers and put a foundation down then get a crane and lift the TT onto the foundation
that'll maker solid
aside from that keep your blocking solid your jacks short, take up about an inch off the suspension, puts some pressure on the stablizers and they will do their job, if the are only just touching the boards they just stop bouncing not wobble
I personally use a couple 6x4 blocks with some peices of 4x4 all about 12 inches long, cross stacked either 2 or 3 high (depending on the terrain)